情态动词 can/can't 用法 — 英语词汇题

根据 Sam 家的家庭规则（family rules）完成句子，每空一词。 家庭规则：晚上八点后不能看电视；每天可以帮妈妈洗碗。 1. It's 9:00 p.m. Sam ___ ___ TV. (watch) 2. After dinner, Sam ___ ___ the dishes. (wash) 3. 下面的句子有一处错误，请改正：Sam can't plays football at nine o'clock at night. 错误改为：___